MESON Chess Problem Database
Problem Display
PID: 70247 (1r2R3/2p4K/3n3p/R4N1p/b3NkPP/8/1p1Pn1Q1/q4r2 w - - 0 1)
Latzel, Gerhard Paul
Chess, 1950
#2
9 + 11
SOLUTION
- SOUND
- Sets
- 1...Sc1
- 2.Qg3#
- 1...Sg1
- 2.Qg3#
- 1...Sc3
- 2.Qg3#
- 1...Sg3
- 2.Qxg3#
- 1...Sd4
- 2.Qg3#
- 1...Sxe4
- 2.Rxe4#
- 2.Qxe4#
- 1...Sxf5
- 2.Rxf5#
- 1...Sc1
- Tries
- 1.Sc3?
- threat
- 2.Sxe2#
- 2.Sd5#
- 1...Bxe8
- 2.Sxe2#
- 1...Sxc3
- 2.Qg3#
- 1...Sxe8
- 2.Sxe2#
- 2.Qe4#
- 1...hxg4
- 2.Sxe2#
- 1...Sg3
- 2.Qxg3#
- 1...Qd1
- 2.Sd5#
- 1...Qe1
- 2.Sd5#
- 1...Qa2
- 2.Sxe2#
- 1...Re1
- 2.Sd5#
- 1...Rf2
- 2.Sd5#
- 1...Rb5
- 2.Sxe2#
- 1...Bd1
- 2.Sd5#
- 1...Bb3
- 2.Sxe2#
- 1...Bb5
- 2.Sd5#
- 1...Bc6
- 2.Sxe2#
- 1...Sc1
- 2.Sd5#
- 2.Qg3#
- 1...Sg1
- 2.Sd5#
- 2.Qg3#
- 1...Sd4
- 2.Sd5#
- 2.Qg3#
- 1...c6
- 2.Sxe2#
- 1...Rxe8!
- threat
- 1.Sg5?
- threat
- 2.Sh3#
- 2.Se6#
- 1...Rxe8
- 2.Sh3#
- 1...hxg4
- 2.Se6#
- 1...Sg3
- 2.Qxg3#
- 1...Qa2
- 2.Sh3#
- 1...Qa3
- 2.Se6#
- 1...Rh1
- 2.Se6#
- 2.Qf3#
- 1...Rf3
- 2.Qxf3#
- 1...Rb3
- 2.Se6#
- 1...Rb5
- 2.Sh3#
- 1...Bb3
- 2.Sh3#
- 1...Bb5
- 2.Sh3#
- 1...Bd7
- 2.Sh3#
- 1...Sg1
- 2.Se6#
- 2.Qg3#
- 1...Sd4
- 2.Sh3#
- 2.Qg3#
- 1...Sb5
- 2.Sh3#
- 2.Re4#
- 2.Qe4#
- 1...c5
- 2.Sh3#
- 1...hxg5!
- threat
- 1.Sf6?
- threat
- 2.Sd5#
- 2.Sxh5#
- 1...Rxe8
- 2.Sxh5#
- 1...Sxe8
- 2.Sxh5#
- 2.Qe4#
- 1...hxg4
- 2.Sh5#
- 2.Qxg4#
- 1...Qa2
- 2.Sxh5#
- 2.Qxf1#
- 1...Rb5
- 2.Sxh5#
- 1...Bb3
- 2.Sxh5#
- 1...Bc6
- 2.Sxh5#
- 1...Sc3
- 2.Sxh5#
- 2.Qg3#
- 1...Sg3
- 2.Qxg3#
- 1...c6
- 2.Sxh5#
- 1...Bxe8!
- threat
- 1.Sfg3?
- threat
- 2.Sxe2#
- 2.Sxh5#
- 1...Bxe8
- 2.Sxe2#
- 1...Sxg3
- 2.Qxg3#
- 1...hxg4
- 2.Sxe2#
- 2.Sh5#
- 1...Qd1
- 2.Sxh5#
- 1...Qe1
- 2.Sxh5#
- 1...Re1
- 2.Sxh5#
- 1...Rf2
- 2.Sxh5#
- 1...Rb5
- 2.Sxe2#
- 1...Bd1
- 2.Sxh5#
- 1...Bb5
- 2.Sxh5#
- 1...Sc1
- 2.Sxh5#
- 1...Sg1
- 2.Sxh5#
- 1...Sc3
- 2.Sxh5#
- 1...Sd4
- 2.Sxh5#
- 1...Kxg4!
- threat
- 1.Sd4?
- threat
- 2.Sxe2#
- 2.Se6#
- 1...Rxe8
- 2.Sxe2#
- 1...Sxd4
- 2.Qg3#
- 1...Sg3
- 2.Qxg3#
- 1...Qd1
- 2.Se6#
- 1...Qe1
- 2.Se6#
- 1...Qa2
- 2.Sxe2#
- 1...Re1
- 2.Se6#
- 2.Qf3#
- 1...Rf2
- 2.Se6#
- 1...Rf3
- 2.Sxe2#
- 2.Qxf3#
- 1...Rb5
- 2.Sxe2#
- 1...Bd1
- 2.Se6#
- 1...Bb3
- 2.Sxe2#
- 1...Bd7
- 2.Sxe2#
- 1...Sc1
- 2.Se6#
- 2.Qg3#
- 1...Sg1
- 2.Se6#
- 2.Qg3#
- 1...Sc3
- 2.Se6#
- 2.Qg3#
- 1...Sb5
- 2.Sxe2#
- 1...c5
- 2.Sxe2#
- 1...Bb5!
- threat
- 1.Sg7?
- threat
- 2.Sxh5#
- 2.Se6#
- 1...Rxe8
- 2.Sxh5#
- 1...Bxe8
- 2.Se6#
- 1...hxg4
- 2.Sh5#
- 2.Se6#
- 1...Sg3
- 2.Qxg3#
- 1...Bb5
- 2.Sxh5#
- 1...Qa2
- 2.Sxh5#
- 1...Rf3
- 2.Sxh5#
- 1...Bb3
- 2.Sxh5#
- 1...Bd7
- 2.Sxh5#
- 1...Sd4
- 2.Sxh5#
- 2.Qg3#
- 1...Sb5
- 2.Sxh5#
- 1...c5
- 2.Sxh5#
- 1...Rb5!
- threat
- 1.Qxf1+?
- 1...Kxg4
- 2.Sf6#
- 1...Qxf1!
- 1...Kxg4
- 1.Sc3?
- Keys
- 1.Seg3!
- threat
- 2.Sxe2#
- 2.Sxh5#
- 1...Kxg4
- 2.Sxe2#
- 1...Rxe8
- 2.Sxh5#
- 1...Bxe8
- 2.Sxe2#
- 1...Sxg3
- 2.Qxg3#
- 1...hxg4
- 2.Sxe2#
- 2.Sh5#
- 1...Qd1
- 2.Sxh5#
- 1...Qe1
- 2.Sxh5#
- 1...Re1
- 2.Sxh5#
- 1...Rf2
- 2.Sxh5#
- 1...Bd1
- 2.Sxh5#
- 1...Bb5
- 2.Sxh5#
- 1...Sc1
- 2.Sxh5#
- 1...Sg1
- 2.Sxh5#
- 1...Sc3
- 2.Sxh5#
- 1...Sd4
- 2.Sxh5#
- threat
- 1.Seg3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 4
- ADDED MATES = 9
- REMOVED MATES = 1
- Sets
- S(d);N_GUARD::QAB1(B)
- S(d);N_GUARD::QAB1(B),XS(d)
- S(h);OGATE,XS(G)::R1(F),XS(h)
- Tries
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- B(e);XR(I)::S(C),XS(d)
- S(d);N_GUARD,XS(C)::QAB1(B)
- P(g);XP(D)::S(C),XS(d)
- S(d);N_GUARD::QAB1(B),XS(d)
- Q(a);::S(C)
- Q(a);::S(C),XS(d)
- R(b);::S(C)
- R(k);::S(C),XS(d)
- B(e);::S(C)
- B(e);::S(C),XS(d)
- P(j);::S(C),XS(d)
- Refutation
- R(k);XR(I)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(k);XR(I)::S(C)
- P(g);XP(D)::S(C)
- S(d);N_GUARD::QAB1(B),XS(d)
- Q(a);::S(C)
- R(b);N_GUARD::QAR1(B),XR(b)
- R(k);::S(C)
- B(e);::S(C)
- P(j);::S(C)
- Refutation
- P(i);XS(C)
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(k);XR(I)::S(C),XP(g)
- R(k);::S(C),XP(g)
- B(e);::S(C),XP(g)
- S(d);N_GUARD::QAB1(B),XS(d)
- P(j);::S(C),XP(g)
- Refutation
- B(e);XR(I)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- B(e);XR(I)::S(G),XS(d)
- S(d);OGATE,XS(G)::QAB1(B),XS(d)
- Q(a);::S(G),XP(g)
- R(b);::S(G),XP(g)
- R(k);::S(G),XS(d)
- B(e);::S(G),XP(g)
- S(d);::S(G),XP(g)
- Refutation
- K(f);P-FLIGHT,XP(D)
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- R(k);XR(I)::S(G),XS(d)
- S(d);N_GUARD,XS(G)::QAB1(B)
- S(d);N_GUARD::QAB1(B),XS(d)
- Q(a);::S(G)
- Q(a);::S(G),XS(d)
- R(b);::S(G)
- R(k);::S(G),XS(d)
- B(e);::S(G)
- B(e);::S(G),XS(d)
- S(h);::S(G),XS(d)
- P(j);::S(G),XS(d)
- Refutation
- B(e);
- Try
- S(G);
- Threat
- DUALS(2)
- Vars
- R(k);XR(I)::S(G),XP(g)
- B(e);XR(I)::S(G)
- S(d);N_GUARD::QAB1(B),XS(d)
- B(e);::S(G),XP(g)
- Q(a);::S(G),XP(g)
- R(b);::S(G),XP(g)
- S(h);::S(G),XP(g)
- P(j);::S(G),XP(g)
- Refutation
- R(k);
- Try
- Q(B);CHECK,XR(b)
- Vars
- K(f);P-FLIGHT,XP(D)::S(C)
- Refutation
- Q(a);XQ(B)
- Try
- Actual
- S(C);
- Threat
- DUALS(2)
- Vars
- K(f);P-FLIGHT,XP(D)::QAR(B)+S(C),XS(d)
- R(k);XR(I)::S(C),XP(g)
- B(e);XR(I)::S(C),XS(d)
- S(d);OGATE,XS(C)::QAB1(B),XS(d)
- Q(a);::S(C),XP(g)
- R(b);::S(C),XP(g)
- B(e);::S(C),XP(g)
- S(d);::S(C),XP(g)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).